Reenforcement for composite piles



May 30, 1933. E. D. WATT REENFORCEMENT FOR COMPOSITE PILES Filed Sept. 20, 1932 .1 1 las smm f.

FIG.1.

Fatented May 3Q, 1933 lllll artnr vnella f ELHU WATT, Ol PLANFIELD, NEVI JERSEY, ASSIGNOR TO RAYBEOND CONCRETE :PELE COMPANY, OF NEW YORK,.N. Y., A CORPORATON GF MEW JERSEY REENFORCEMENT FOR COMPOSITE PILES Application led September 20, 1932. Serial No. 833,965.

In the use of composite piles, which usually have lower sections of wood and upper sections of concrete, great dilliculty has been encountered in effectively binding the sections together to prevent them pulling apart due to heaving of the ground.

A common method of binding the sections together is shown in Gundersen Patent No. 1,019,042, which shows vertical reenforcing rods having their lower ends bent at right angles to enter horizontal holes drilled into the upper part of the lower section, the upper end of the lower section having a portion of reduced diameter in the forni ot a tenon embedded in the concrete or" the upper section. Other expediente of somewhat similar nature have been tried, and insofar as l am aware, all of them have failed under certain conditions. For instance, when severe 'l ground upheavals occur, the bends in the Gunderson rods straighten out and the rods pull out of their sockets in the lower pile sections.

An object of the present invention is to 'i overcome the above described diliiculty by` connecting the lower ends of the vertical reeniorcing rods to substantial metal bars passing horizontally through the upper ends oi' the lower pile section. ln this arrangement, the vertical bars are subjected only to tension, while the horizontal bars are of suflicientcross section to withstand the shearing strains imposed upon them by the vertical rods. Preferably, the vertical rods are bent into U form and pass around the projecting ends of the horizontal bars.

Further and other objects and advantag-es will be apparent from the specilication and claims, and from the accompanying drawing which illustrates what is now considered the preferred embodiment of the invention.

Fig. 1 is a view oi one i'orm ot' the invention partly broken away and partly in section.

Fig. 2 is a cross section on line 2-2 of Fig. 1.

Fig. 3 is a cross section on line 3-3 ot Fig. 1.

In the drawing, reference numeral 10 designates a lower pile section having its upper end in the form of a tenon 12. Passing horizontally through the tenon are bars 14, of substantial crosssection with their ends projecting suiliciently to accommodate the snuglylitting U portions of the verticaly extending rods 16. Staples 18 assist in holding rods 16 in position against the tenon while the concrete of the upper pile section is being poured. Usually in practice the lower pile section 10 is driven until its upper end approaches ground level, whereupon the reenforcing inembersare placed in position as abovadescribed, then shell 2O is mounted on section 10, leaving an annular space between the shell and tenon 12. In this space are the ends ot bars 14 and the U portions of the reenforcingrods. The shell may be provided at its low-er end with a `welded-on stifl'ening ring 22 entering a groove in the lower section, as shown. Shell 20 is then lilled with plastic conc-rete 24 which surrounds and encloses tenon 12 and vthe reentorcing elements so that when the concrete has set,the upper and lower pile sections forni a unit eiiectively tied together by bars lll and rods 16. The body of the upper secion may, ir desired, be Ifurther reenforced by rings 26 and bars 28 or by anyother suitable method.

It is to be understood that the invention is not limited to the specific embodiment herein illustrated and described, but may be used in other waystwithout departure from its spirit as definedby the following claims:

1. Af composite pile having a lower preformed section and an upper section of concrete, said lower section extending upwardly into the lower end ot said upper section, in combination with means for reenforcing the joint between said sections, said means cornprising bars extending through the upper end ot' said lower section, and rods engaging 2 i i,912,11i

combination with means for reenforcing the joint between said sections, said means comprising a bar extending horizontally through the upper end of said lower section and projecting therefrom, and rods looped around said bar ends and extending upwardly into said upper pile section.

3. A composite pile having a lower preformed section and an upper section of concrete, said lower section extending upward-v ly into the lower end of said upper section, in combination with means for reenforcing the joint between said sections, said means comprising a bar extending horizontally through the upper end of said lower section and projecting therefrom, and U-shaped rods engaging said bar ends and having their ends extending upwardly into said upper pile section.

4. A composite pilehaving a lower pre-y formed section and an upper section of concrete, said lower section extending upwardly into the lower end of said upper section, in combination with means for reeniiorcing the joint between said sections, said means comprising a bar extending through the upper endfof said lower section and projecting therefrom, and rods hooked around the ends of said bar and extending upwardly, said rods and the ends or' said bars being embedded in the concrete ot said upper section.

5. A composite pile comprising a lower section having a. tenon, an upper concrete section surrounding said tenon, in combination with means for reenforcing the joint between said sections, said means comprising bars extending horizontally through said tenon and rods bent over the ends of said bars and extending upwardly into said upper pile section.

6. A composite pile comprising a lower section having a tenon, an upper concrete section surrounding said tenon, in combination with means for reenforcing the joint between said sections, said means comprising bars extending through said tcnon, rods hooked around the ends ot said bars and extending upwardly into the concrete of the upper section, and means for holding the rods in engagement with the ends of the bars.

In testimony whereof I hereto aiiix my signature.

ELIHU D. WATT. 

